What is the difference between Acitvity_Main.xml and Fragment_main.xml files in Android Studio

Question

When ever i create a new project, the Fragment_main.xml file is added to my Layout folder and unlike in Eclipse it is this file that contains what is normally in the Activit

Answer 1

just as Bytehawks said above.

activity_main.xml describes Layout for the FragmentActivity and the fragment_main.xml is the Layout for the fragment.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); //get the activity_main.xml for layout
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);


    //code for describing layout more details, get fragment_main.xml
    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment())
                .commit();
    }
}
 /**
 * A placeholder fragment containing a simple view.
 */
public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        return rootView;
    }
}